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design language·katagami-stencil-rail-system

Katagami Stencil Rail System

A portable design language for agents: download the markdown first, then inspect the preview, tokens, and rules as needed.

Download DESIGN.md

Portable DESIGN.md source of truth for most agents and apps.

the spec

specification

philosophy
summary
A calm Japanese editorial workspace where a precise stencil rail overlays dense source material, using negative space, hairline cut marks, and paper-like layers to organize context without dashboard chrome.
values
negative-space organizationlong-form reading clarityannotation as structuredesaturated categorical meaningquiet archive precision
anti-values
×boxed analytics dashboards×thick colorful selection fills×decorative Japanese wallpaper motifs×generic SaaS navigation chrome
tokens
borders4 items
accent width
1px
character
stencil-like outlines, not heavy strokes or filled selections
default width
1px
style
solid hairline with cut-corner pseudo elements
colors12 items
accent
#B48A43
background
#FCFCFA
border
#D7E0E1
error
#8C4A3F
info
#1E557A
muted
#667174
primary
#1E557A
secondary
#7D9162
success
#6F7F55
surface
#F2F6F7
text
#1F2324
warning
#B48A43
motion3 items
duration
180ms
easing
cubic-bezier(0.2, 0, 0.1, 1)
philosophy
quiet sheet slides and rail reveals; no bouncy easing, spinning, or decorative animation
radii5 items
full
9999px
lg
6px
md
4px
none
0
sm
2px
shadows3 items
lg
0 24px 60px rgba(31,35,36,0.10)
md
0 12px 30px rgba(31,35,36,0.07)
sm
0 1px 0 rgba(31,35,36,0.04)
spacing2 items
base
8px
scale
4, 8, 12, 16, 24, 32, 48, 64
surfaces3 items
bg pattern
none except sparse one-pixel registration marks and low-opacity column rules
card style
unboxed paper modules separated by hairlines, tabs, and offset sheet edges
treatment
flat porcelain canvas with cool paper sheets and almost imperceptible grain
typography8 items
base size
16px
body font
Source Serif 4
google fonts url
https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Noto+Serif+JP:wght@500;700&family=Source+Serif+4:opsz,wght@8..60,400;8..60,600&family=Inter:wght@400;500;600&display=swap
heading font
Noto Serif JP
letter spacing
-0.01em
line height
1.62
mono font
IBM Plex Mono
scale ratio
1.2
rules
composition
Use a three-layer editorial composition: dense reading material on the left, a narrow context rail in the middle, and a sliding inspector paper sheet on the right only when decisions or metadata need focus.
density

High information density is allowed when rows, citations, and claims align to the 4/8px grid and section rhythm opens every 24 or 32px.

hierarchy
Hierarchy comes from type scale, line length, indentation, hairline separators, small tabs, and reserved whitespace; accents mark state with strokes and dots rather than colored containers.
signature patterns
Stencil rail: vertical modules use outline tabs, 1px active indigo spine, and small anchor dots that point into the reading margin.Cut-mark annotations: pseudo-elements draw tiny L-shaped corner marks beside selected paragraphs and inspector headings.Paper sheet inspector: a cool tinted sheet slides over the canvas with a left hairline seam and no rounded dashboard-card frame.Thread micro-bars: calm data summaries use thin horizontal bars and sparse categorical tints in matcha or ochre at low opacity.
layout
breakpoints

mobile 375px, tablet 768px, desktop 1200px, wide 1440px

grid

Desktop uses 12-column reading grid with fixed 56px stencil rail and 320px inspector; tablet stacks inspector below rail; mobile turns rail into top index tabs.

whitespace

Whitespace is ma-like and rhythmic: 24px between sections, 32px for major shifts, and narrow 8px gutters inside rail modules.

guidance
do
  • Keep accents as 1px strokes, small tabs, outline glyphs, dots, and low-opacity tints.
  • Use real editorial content with citations, claims, marginalia, and calm decision summaries.
  • Let negative space and hairlines create hierarchy before adding color or shadow.
  • Keep long-form text readable with serif typography and generous line-height.
avoid
  • Do not use boxed dashboard widgets, thick blue filled selections, or generic sidebar chrome.
  • Do not turn Japanese motifs into decorative wallpaper, waves, fans, or ornamental backgrounds.
  • Do not overload the interface with pills, bubbly radii, saturated fills, or heavy drop shadows.
  • Do not use monospace for body text except citations and structured data.
katagami spec
# Katagami Stencil Rail System

## Philosophy

A calm Japanese editorial workspace where a precise stencil rail overlays dense source material, using negative space, hairline cut marks, and paper-like layers to organize context without dashboard chrome.

### Values

- negative-space organization
- long-form reading clarity
- annotation as structure
- desaturated categorical meaning
- quiet archive precision

### Anti-Values

- boxed analytics dashboards
- thick colorful selection fills
- decorative Japanese wallpaper motifs
- generic SaaS navigation chrome

### Visual Character

- Three CSS grid columns create a reading plane, 56px stencil rail, and optional 320px inspector sheet with responsive collapse.
- One-pixel borders and pseudo-element cut marks form tabs, anchors, separators, and active rail indicators instead of filled controls.
- Porcelain and cool-blue surfaces stay nearly flat, with 4 to 8 percent tinted categorical strips rather than saturated background fills.
- Long-form serif text receives generous line-height while compact sans labels use uppercase tracking and small numeric rail counters.
- Annotation anchors appear as outline glyphs, small tabs, and active dots positioned in the margin rather than pill-heavy badges.

## Tokens

### Borders

- **Accent Width**: 1px
- **Character**: stencil-like outlines, not heavy strokes or filled selections
- **Default Width**: 1px
- **Style**: solid hairline with cut-corner pseudo elements

### Colors

| Name | Value |
|------|-------|
| accent | `#B48A43` |
| background | `#FCFCFA` |
| border | `#D7E0E1` |
| error | `#8C4A3F` |
| info | `#1E557A` |
| muted | `#667174` |
| primary | `#1E557A` |
| secondary | `#7D9162` |
| success | `#6F7F55` |
| surface | `#F2F6F7` |
| text | `#1F2324` |
| warning | `#B48A43` |

### Motion

- **Duration**: 180ms
- **Easing**: cubic-bezier(0.2, 0, 0.1, 1)
- **Philosophy**: quiet sheet slides and rail reveals; no bouncy easing, spinning, or decorative animation

### Radii

- **Full**: 9999px
- **Lg**: 6px
- **Md**: 4px
- **None**: 0
- **Sm**: 2px

### Shadows

- **Lg**: 0 24px 60px rgba(31,35,36,0.10)
- **Md**: 0 12px 30px rgba(31,35,36,0.07)
- **Sm**: 0 1px 0 rgba(31,35,36,0.04)

### Spacing

- **Base**: 8px
- **Scale**: [4,8,12,16,24,32,48,64]

### Surfaces

- **Bg Pattern**: none except sparse one-pixel registration marks and low-opacity column rules
- **Card Style**: unboxed paper modules separated by hairlines, tabs, and offset sheet edges
- **Treatment**: flat porcelain canvas with cool paper sheets and almost imperceptible grain

### Typography

- **Base Size**: 16px
- **Body Font**: Source Serif 4
- **Google Fonts Url**: https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Noto+Serif+JP:wght@500;700&family=Source+Serif+4:opsz,wght@8..60,400;8..60,600&family=Inter:wght@400;500;600&display=swap
- **Heading Font**: Noto Serif JP
- **Letter Spacing**: -0.01em
- **Line Height**: 1.62
- **Mono Font**: IBM Plex Mono
- **Scale Ratio**: 1.2

## Rules

### Composition

Use a three-layer editorial composition: dense reading material on the left, a narrow context rail in the middle, and a sliding inspector paper sheet on the right only when decisions or metadata need focus.

### Density

High information density is allowed when rows, citations, and claims align to the 4/8px grid and section rhythm opens every 24 or 32px.

### Hierarchy

Hierarchy comes from type scale, line length, indentation, hairline separators, small tabs, and reserved whitespace; accents mark state with strokes and dots rather than colored containers.

### Signature Patterns

- Stencil rail: vertical modules use outline tabs, 1px active indigo spine, and small anchor dots that point into the reading margin.
- Cut-mark annotations: pseudo-elements draw tiny L-shaped corner marks beside selected paragraphs and inspector headings.
- Paper sheet inspector: a cool tinted sheet slides over the canvas with a left hairline seam and no rounded dashboard-card frame.
- Thread micro-bars: calm data summaries use thin horizontal bars and sparse categorical tints in matcha or ochre at low opacity.

## Layout

### Breakpoints

mobile 375px, tablet 768px, desktop 1200px, wide 1440px

### Grid

Desktop uses 12-column reading grid with fixed 56px stencil rail and 320px inspector; tablet stacks inspector below rail; mobile turns rail into top index tabs.

### Whitespace

Whitespace is ma-like and rhythmic: 24px between sections, 32px for major shifts, and narrow 8px gutters inside rail modules.

## Guidance

### Do

- Keep accents as 1px strokes, small tabs, outline glyphs, dots, and low-opacity tints.
- Use real editorial content with citations, claims, marginalia, and calm decision summaries.
- Let negative space and hairlines create hierarchy before adding color or shadow.
- Keep long-form text readable with serif typography and generous line-height.

### Don't

- Do not use boxed dashboard widgets, thick blue filled selections, or generic sidebar chrome.
- Do not turn Japanese motifs into decorative wallpaper, waves, fans, or ornamental backgrounds.
- Do not overload the interface with pills, bubbly radii, saturated fills, or heavy drop shadows.
- Do not use monospace for body text except citations and structured data.
DESIGN.md
---
version: "alpha"
name: "Katagami Stencil Rail System"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  accent: "#B48A43"
  background: "#FCFCFA"
  border: "#D7E0E1"
  error: "#8C4A3F"
  info: "#1E557A"
  muted: "#667174"
  primary: "#1E557A"
  secondary: "#7D9162"
  success: "#6F7F55"
  surface: "#F2F6F7"
  text: "#1F2324"
  warning: "#B48A43"
typography:
  headline-lg:
    fontFamily: "Noto Serif JP"
    fontSize: "1.728rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.01em"
  headline-md:
    fontFamily: "Noto Serif JP"
    fontSize: "1.44rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.01em"
  body-md:
    fontFamily: "Source Serif 4"
    fontSize: "16px"
    fontWeight: 400
    lineHeight: 1.62
    letterSpacing: "-0.01em"
  label-md:
    fontFamily: "IBM Plex Mono"
    fontSize: "0.75rem"
    fontWeight: 600
    lineHeight: 1
    letterSpacing: "0.08em"
rounded:
  full: "9999px"
  lg: "6px"
  md: "4px"
  none: "0px"
  sm: "2px"
spacing:
  base: "8px"
  xs: "4px"
  sm: "8px"
  md: "12px"
  lg: "16px"
  xl: "24px"
  2xl: "32px"
  3xl: "48px"
  4xl: "64px"
components:
  color-reference-accent:
    backgroundColor: "{colors.accent}"
  color-reference-background:
    backgroundColor: "{colors.background}"
  color-reference-border:
    backgroundColor: "{colors.border}"
  color-reference-error:
    backgroundColor: "{colors.error}"
  color-reference-info:
    backgroundColor: "{colors.info}"
  color-reference-muted:
    backgroundColor: "{colors.muted}"
  color-reference-primary:
    backgroundColor: "{colors.primary}"
  color-reference-secondary:
    backgroundColor: "{colors.secondary}"
  color-reference-success:
    backgroundColor: "{colors.success}"
  color-reference-surface:
    backgroundColor: "{colors.surface}"
  color-reference-text:
    backgroundColor: "{colors.text}"
  color-reference-warning:
    backgroundColor: "{colors.warning}"
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "#ffffff"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: "{spacing.md}"
  card-surface:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    padding: "{spacing.md}"
  input-default:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    height: "44px"
---

# Katagami Stencil Rail System

## Overview

A calm Japanese editorial workspace where a precise stencil rail overlays dense source material, using negative space, hairline cut marks, and paper-like layers to organize context without dashboard chrome.

### Values

- negative-space organization
- long-form reading clarity
- annotation as structure
- desaturated categorical meaning
- quiet archive precision

### Anti-Values

- boxed analytics dashboards
- thick colorful selection fills
- decorative Japanese wallpaper motifs
- generic SaaS navigation chrome

### Visual Character

- Three CSS grid columns create a reading plane, 56px stencil rail, and optional 320px inspector sheet with responsive collapse.
- One-pixel borders and pseudo-element cut marks form tabs, anchors, separators, and active rail indicators instead of filled controls.
- Porcelain and cool-blue surfaces stay nearly flat, with 4 to 8 percent tinted categorical strips rather than saturated background fills.
- Long-form serif text receives generous line-height while compact sans labels use uppercase tracking and small numeric rail counters.
- Annotation anchors appear as outline glyphs, small tabs, and active dots positioned in the margin rather than pill-heavy badges.

## Colors

Use the YAML color tokens as the normative palette. The prose below names the roles agents should preserve when generating UI.

| Token | Value |
|-------|-------|
| accent | `#B48A43` |
| background | `#FCFCFA` |
| border | `#D7E0E1` |
| error | `#8C4A3F` |
| info | `#1E557A` |
| muted | `#667174` |
| primary | `#1E557A` |
| secondary | `#7D9162` |
| success | `#6F7F55` |
| surface | `#F2F6F7` |
| text | `#1F2324` |
| warning | `#B48A43` |

## Typography

- **Headline-Lg**: Noto Serif JP, 1.728rem, weight 700, line-height 1.1.
- **Headline-Md**: Noto Serif JP, 1.44rem, weight 600, line-height 1.15.
- **Body-Md**: Source Serif 4, 16px, weight 400, line-height 1.62.
- **Label-Md**: IBM Plex Mono, 0.75rem, weight 600, line-height 1.

## Layout

### Spacing Tokens

- **Base**: `8px`
- **Xs**: `4px`
- **Sm**: `8px`
- **Md**: `12px`
- **Lg**: `16px`
- **Xl**: `24px`
- **2xl**: `32px`
- **3xl**: `48px`
- **4xl**: `64px`

### Breakpoints

mobile 375px, tablet 768px, desktop 1200px, wide 1440px

### Grid

Desktop uses 12-column reading grid with fixed 56px stencil rail and 320px inspector; tablet stacks inspector below rail; mobile turns rail into top index tabs.

### Whitespace

Whitespace is ma-like and rhythmic: 24px between sections, 32px for major shifts, and narrow 8px gutters inside rail modules.

## Elevation & Depth

### Shadows

- **Lg**: 0 24px 60px rgba(31,35,36,0.10)
- **Md**: 0 12px 30px rgba(31,35,36,0.07)
- **Sm**: 0 1px 0 rgba(31,35,36,0.04)

## Shapes

### Rounded

- **Full**: `9999px`
- **Lg**: `6px`
- **Md**: `4px`
- **None**: `0px`
- **Sm**: `2px`

### Surfaces

- **Bg Pattern**: none except sparse one-pixel registration marks and low-opacity column rules
- **Card Style**: unboxed paper modules separated by hairlines, tabs, and offset sheet edges
- **Treatment**: flat porcelain canvas with cool paper sheets and almost imperceptible grain

### Borders

- **Accent Width**: 1px
- **Character**: stencil-like outlines, not heavy strokes or filled selections
- **Default Width**: 1px
- **Style**: solid hairline with cut-corner pseudo elements

## Components

### Composition

Use a three-layer editorial composition: dense reading material on the left, a narrow context rail in the middle, and a sliding inspector paper sheet on the right only when decisions or metadata need focus.

### Density

High information density is allowed when rows, citations, and claims align to the 4/8px grid and section rhythm opens every 24 or 32px.

### Hierarchy

Hierarchy comes from type scale, line length, indentation, hairline separators, small tabs, and reserved whitespace; accents mark state with strokes and dots rather than colored containers.

### Signature Patterns

- Stencil rail: vertical modules use outline tabs, 1px active indigo spine, and small anchor dots that point into the reading margin.
- Cut-mark annotations: pseudo-elements draw tiny L-shaped corner marks beside selected paragraphs and inspector headings.
- Paper sheet inspector: a cool tinted sheet slides over the canvas with a left hairline seam and no rounded dashboard-card frame.
- Thread micro-bars: calm data summaries use thin horizontal bars and sparse categorical tints in matcha or ochre at low opacity.

## shadcn/ui Usage

When the target app uses shadcn/ui, copy DESIGN.md with shadcn instead of the plain DESIGN.md. It contains the same Katagami design-language source plus the shadcn/ui primitives, imports, theme variables, component recipes, and preview-shot guidance.

DESIGN.md with shadcn: `/language/en-019ee037-40c7-76f0-8325-d0054fe8dd42/DESIGN.with-shadcn.md`.

The shadcn page also exposes optional machine-readable files for automation, but the human-facing handoff is DESIGN.md with shadcn.

Install recommended primitives with `npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table`.

Use these primitives in shadcn apps:
- button
- card
- input
- textarea
- select
- dialog
- sheet
- tabs
- badge
- separator
- checkbox
- switch
- slider
- tooltip
- dropdown-menu
- table

Implementation rule for agents: import shadcn primitives from `@/components/ui/*`, apply the generated CSS variables first, then compose the language-specific recipes from the companion MD. Katagami remains the source of truth; shadcn names are the implementation surface.

## Do's and Don'ts

- Do Keep accents as 1px strokes, small tabs, outline glyphs, dots, and low-opacity tints.
- Do Use real editorial content with citations, claims, marginalia, and calm decision summaries.
- Do Let negative space and hairlines create hierarchy before adding color or shadow.
- Do Keep long-form text readable with serif typography and generous line-height.
- Don't Do not use boxed dashboard widgets, thick blue filled selections, or generic sidebar chrome.
- Don't Do not turn Japanese motifs into decorative wallpaper, waves, fans, or ornamental backgrounds.
- Don't Do not overload the interface with pills, bubbly radii, saturated fills, or heavy drop shadows.
- Don't Do not use monospace for body text except citations and structured data.
shadcn/ui theme
```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "katagami-stencil-rail-system",
  "type": "registry:theme",
  "title": "Katagami Stencil Rail System shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#FCFCFA",
      "foreground": "#1F2324",
      "card": "#F2F6F7",
      "card-foreground": "#1F2324",
      "popover": "#F2F6F7",
      "popover-foreground": "#1F2324",
      "primary": "#1E557A",
      "primary-foreground": "#ffffff",
      "secondary": "#7D9162",
      "secondary-foreground": "#ffffff",
      "muted": "#667174",
      "muted-foreground": "#1F2324",
      "accent": "#B48A43",
      "accent-foreground": "#ffffff",
      "destructive": "#8C4A3F",
      "border": "#D7E0E1",
      "input": "#D7E0E1",
      "ring": "#B48A43",
      "chart-1": "#1E557A",
      "chart-2": "#7D9162",
      "chart-3": "#B48A43",
      "chart-4": "#6F7F55",
      "chart-5": "#B48A43",
      "sidebar": "#F2F6F7",
      "sidebar-foreground": "#1F2324",
      "sidebar-primary": "#1E557A",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#1E557A",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#D7E0E1",
      "sidebar-ring": "#B48A43",
      "radius": "4px"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#1E557A",
      "primary-foreground": "#ffffff",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#B48A43",
      "accent-foreground": "#ffffff",
      "destructive": "#8C4A3F",
      "border": "#303642",
      "input": "#303642",
      "ring": "#B48A43",
      "chart-1": "#1E557A",
      "chart-2": "#7D9162",
      "chart-3": "#B48A43",
      "chart-4": "#6F7F55",
      "chart-5": "#B48A43",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#1E557A",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#B48A43",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#303642",
      "sidebar-ring": "#B48A43",
      "radius": "4px"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019ee037-40c7-76f0-8325-d0054fe8dd42",
    "slug": "katagami-stencil-rail-system",
    "componentManifest": [
      "button",
      "card",
      "input",
      "textarea",
      "select",
      "dialog",
      "sheet",
      "tabs",
      "badge",
      "separator",
      "checkbox",
      "switch",
      "slider",
      "tooltip",
      "dropdown-menu",
      "table"
    ],
    "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
    "nativeTokenNames": {
      "borders": [
        "accent_width",
        "character",
        "default_width",
        "style"
      ],
      "colors": [
        "accent",
        "background",
        "border",
        "error",
        "info",
        "muted",
        "primary",
        "secondary",
        "success",
        "surface",
        "text",
        "warning"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ],
      "radii": [
        "full",
        "lg",
        "md",
        "none",
        "sm"
      ],
      "shadows": [
        "lg",
        "md",
        "sm"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "treatment"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "letter_spacing",
        "line_height",
        "mono_font",
        "scale_ratio"
      ]
    }
  }
}
```
in the wild

embodiments

the full element showcase
embodiment · katagami-stencil-rail-system
DESIGN.md

at a glance

Palette

Typography

headline-lgNoto Serif JP · 28px · 700

The quick brown fox jumps

headline-mdNoto Serif JP · 23px · 600

The quick brown fox jumps

body-mdSource Serif 4 · 16px · 400

The quick brown fox jumps

label-mdIBM Plex Mono · 12px · 600

The quick brown fox jumps

Components

New
Card title

Components rendered with this language’s tokens — colors, type, and rounded corners as specified.

Spacing

  • base8px
  • xs4px
  • sm8px
  • md12px
  • lg16px
  • xl24px
  • 2xl32px
  • 3xl48px
  • 4xl64px

Shape

full9999px
lg6px
md4px
none0px
sm2px
shadcn/ui

implementation kit

needs agent-authored kitcompatibility fallback
shadcn compatibility only
The generated theme variables are available, but the polished shadcn component recipes and shots have not been authored by the Katagami agent yet.
fallbackprimitives render
Compatibility proof
Local shadcn-style primitives accept the generated theme variables.
primaryaccentsurfacemutederror
table rhythm
buttonok
cardok
inputok
recommendedcompatibility fallback

DESIGN.md with shadcn

Copy this when the target app uses shadcn/ui. It packages the Katagami DESIGN.md context with the install list, theme variables, component recipes, preview-shot contract, and starter TSX in one Markdown companion.

advanced implementation filesoptional machine-readable theme, CSS, TSX starter, recipes, and preview contract
shadcn add
npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table
theme css
:root {
  --background: #FCFCFA;
  --foreground: #1F2324;
  --card: #F2F6F7;
  --card-foreground: #1F2324;
  --popover: #F2F6F7;
  --popover-foreground: #1F2324;
  --primary: #1E557A;
  --primary-foreground: #ffffff;
  --secondary: #7D9162;
  --secondary-foreground: #ffffff;
  --muted: #667174;
  --muted-foreground: #1F2324;
  --accent: #B48A43;
  --accent-foreground: #ffffff;
  --destructive: #8C4A3F;
  --border: #D7E0E1;
  --input: #D7E0E1;
  --ring: #B48A43;
  --chart-1: #1E557A;
  --chart-2: #7D9162;
  --chart-3: #B48A43;
  --chart-4: #6F7F55;
  --chart-5: #B48A43;
  --sidebar: #F2F6F7;
  --sidebar-foreground: #1F2324;
  --sidebar-primary: #1E557A;
  --sidebar-primary-foreground: #ffffff;
  --sidebar-accent: #1E557A;
  --sidebar-accent-foreground: #ffffff;
  --sidebar-border: #D7E0E1;
  --sidebar-ring: #B48A43;
  --radius: 4px;
}

.dark {
  --background: #0f1115;
  --foreground: #f8fafc;
  --card: #181b22;
  --card-foreground: #f8fafc;
  --popover: #181b22;
  --popover-foreground: #f8fafc;
  --primary: #1E557A;
  --primary-foreground: #ffffff;
  --secondary: #252a33;
  --secondary-foreground: #f8fafc;
  --muted: #252a33;
  --muted-foreground: #a1a1aa;
  --accent: #B48A43;
  --accent-foreground: #ffffff;
  --destructive: #8C4A3F;
  --border: #303642;
  --input: #303642;
  --ring: #B48A43;
  --chart-1: #1E557A;
  --chart-2: #7D9162;
  --chart-3: #B48A43;
  --chart-4: #6F7F55;
  --chart-5: #B48A43;
  --sidebar: #181b22;
  --sidebar-foreground: #f8fafc;
  --sidebar-primary: #1E557A;
  --sidebar-primary-foreground: #ffffff;
  --sidebar-accent: #B48A43;
  --sidebar-accent-foreground: #ffffff;
  --sidebar-border: #303642;
  --sidebar-ring: #B48A43;
  --radius: 4px;
}
tsx starter
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardFooter,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";

export function KatagamiStencilRailSystemShadcnKit() {
  return (
    <section className="grid gap-4 rounded-[var(--radius)] border bg-background p-4 text-foreground">
      <div className="flex items-start justify-between gap-4">
        <div>
          <Badge variant="outline">shadcn/ui</Badge>
          <h2 className="mt-3 text-2xl font-semibold tracking-tight">Katagami Stencil Rail System</h2>
          <p className="mt-1 max-w-xl text-sm text-muted-foreground">
            Use the Katagami registry theme, then compose these shadcn primitives
            with the language-specific component recipes.
          </p>
        </div>
        <Button>Apply theme</Button>
      </div>

      <Tabs defaultValue="components">
        <TabsList>
          <TabsTrigger value="components">Components</TabsTrigger>
          <TabsTrigger value="states">States</TabsTrigger>
          <TabsTrigger value="export">Export</TabsTrigger>
        </TabsList>
      </Tabs>

      <Card>
        <CardHeader>
          <CardTitle>Component recipe</CardTitle>
          <CardDescription>
            Replace this starter content with the agent-authored product scene
            from components.md and preview-shots.json.
          </CardDescription>
        </CardHeader>
        <CardContent className="grid gap-3 sm:grid-cols-[1fr_auto]">
          <Input defaultValue="Tokenized shadcn surface" aria-label="Recipe name" />
          <Button variant="secondary">Preview state</Button>
        </CardContent>
        <CardFooter className="justify-between">
          <Badge>Ready</Badge>
          <Button variant="outline">Copy recipe</Button>
        </CardFooter>
      </Card>
    </section>
  );
}
theme JSONcompatibility fallback
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "katagami-stencil-rail-system",
  "type": "registry:theme",
  "title": "Katagami Stencil Rail System shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#FCFCFA",
      "foreground": "#1F2324",
      "card": "#F2F6F7",
      "card-foreground": "#1F2324",
      "popover": "#F2F6F7",
      "popover-foreground": "#1F2324",
      "primary": "#1E557A",
      "primary-foreground": "#ffffff",
      "secondary": "#7D9162",
      "secondary-foreground": "#ffffff",
      "muted": "#667174",
      "muted-foreground": "#1F2324",
      "accent": "#B48A43",
      "accent-foreground": "#ffffff",
      "destructive": "#8C4A3F",
      "border": "#D7E0E1",
      "input": "#D7E0E1",
      "ring": "#B48A43",
      "chart-1": "#1E557A",
      "chart-2": "#7D9162",
      "chart-3": "#B48A43",
      "chart-4": "#6F7F55",
      "chart-5": "#B48A43",
      "sidebar": "#F2F6F7",
      "sidebar-foreground": "#1F2324",
      "sidebar-primary": "#1E557A",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#1E557A",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#D7E0E1",
      "sidebar-ring": "#B48A43",
      "radius": "4px"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#1E557A",
      "primary-foreground": "#ffffff",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#B48A43",
      "accent-foreground": "#ffffff",
      "destructive": "#8C4A3F",
      "border": "#303642",
      "input": "#303642",
      "ring": "#B48A43",
      "chart-1": "#1E557A",
      "chart-2": "#7D9162",
      "chart-3": "#B48A43",
      "chart-4": "#6F7F55",
      "chart-5": "#B48A43",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#1E557A",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#B48A43",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#303642",
      "sidebar-ring": "#B48A43",
      "radius": "4px"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019ee037-40c7-76f0-8325-d0054fe8dd42",
    "slug": "katagami-stencil-rail-system",
    "componentManifest": [
      "button",
      "card",
      "input",
      "textarea",
      "select",
      "dialog",
      "sheet",
      "tabs",
      "badge",
      "separator",
      "checkbox",
      "switch",
      "slider",
      "tooltip",
      "dropdown-menu",
      "table"
    ],
    "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
    "nativeTokenNames": {
      "borders": [
        "accent_width",
        "character",
        "default_width",
        "style"
      ],
      "colors": [
        "accent",
        "background",
        "border",
        "error",
        "info",
        "muted",
        "primary",
        "secondary",
        "success",
        "surface",
        "text",
        "warning"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ],
      "radii": [
        "full",
        "lg",
        "md",
        "none",
        "sm"
      ],
      "shadows": [
        "lg",
        "md",
        "sm"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "treatment"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "letter_spacing",
        "line_height",
        "mono_font",
        "scale_ratio"
      ]
    }
  }
}
component recipescompatibility fallback
# Katagami Stencil Rail System shadcn/ui Components

Artifact: `component-recipes-v1`
Author: `katagami-ui-projection`
Language ID: `en-019ee037-40c7-76f0-8325-d0054fe8dd42`
Slug: `katagami-stencil-rail-system`

## Intent

A calm Japanese editorial workspace where a precise stencil rail overlays dense source material, using negative space, hairline cut marks, and paper-like layers to organize context without dashboard chrome.

## Required primitives

- button
- card
- input
- textarea
- select
- dialog
- sheet
- tabs
- badge
- separator
- checkbox
- switch
- slider
- tooltip
- dropdown-menu
- table

Install with `npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table`.

## Token cues

Colors:

{
  "accent": "#B48A43",
  "background": "#FCFCFA",
  "border": "#D7E0E1",
  "error": "#8C4A3F",
  "info": "#1E557A",
  "muted": "#667174",
  "primary": "#1E557A",
  "secondary": "#7D9162",
  "success": "#6F7F55",
  "surface": "#F2F6F7",
  "text": "#1F2324",
  "warning": "#B48A43"
}

Typography:

{
  "base_size": "16px",
  "body_font": "Source Serif 4",
  "google_fonts_url": "https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Noto+Serif+JP:wght@500;700&family=Source+Serif+4:opsz,wght@8..60,400;8..60,600&family=Inter:wght@400;500;600&display=swap",
  "heading_font": "Noto Serif JP",
  "letter_spacing": "-0.01em",
  "line_height": 1.62,
  "mono_font": "IBM Plex Mono",
  "scale_ratio": 1.2
}

## Visual character to preserve

- Three CSS grid columns create a reading plane, 56px stencil rail, and optional 320px inspector sheet with responsive collapse.
- One-pixel borders and pseudo-element cut marks form tabs, anchors, separators, and active rail indicators instead of filled controls.
- Porcelain and cool-blue surfaces stay nearly flat, with 4 to 8 percent tinted categorical strips rather than saturated background fills.
- Long-form serif text receives generous line-height while compact sans labels use uppercase tracking and small numeric rail counters.
- Annotation anchors appear as outline glyphs, small tabs, and active dots positioned in the margin rather than pill-heavy badges.

## ShadSync visual profile

{
  "family": "paper-collage",
  "material": "paper",
  "contour": "pebble",
  "border": "solid",
  "underlay": true,
  "grain": true,
  "stickerBadges": true,
  "motion": "still",
  "density": "dense",
  "accents": [
    "primary",
    "accent",
    "secondary",
    "muted"
  ]
}

## Signature component recipes

### Button
Use `Button` for primary, secondary, outline, and ghost actions. Primary actions must expose the language's strongest contrast pair, while secondary and ghost actions should preserve the surface treatment instead of falling back to default neutral SaaS styling.

### Card
Use `Card`, `CardHeader`, `CardContent`, `CardFooter`, and `CardAction` as the main composition frame. Cards should demonstrate the language's surface, border, hierarchy, and density rules rather than appearing as generic rounded rectangles.

### Input and Textarea
Use `Input` and `Textarea` with visible focus rings, field labels, validation states, and the language's rhythm. Forms should show real product content, not placeholder-only controls.

### Select, Tabs, and Table
Use `Select`, `Tabs`, and `Table` to prove navigation, filtering, and dense data states. The table should show row rhythm, separators, hover/focus states, and an empty or status state when the language calls for it.

### Dialog and Sheet
Use `Dialog` for centered decisions and `Sheet` for contextual editing. Both should inherit the language's spacing, border, overlay, and motion rules.

## Preview shots

- `application-shell`: dashboard or workspace shell with navigation, cards, forms, and state badges.
- `detail-editor`: focused editing flow using input, textarea, select, switch/checkbox, dialog or sheet, and action buttons.
- `data-operations`: table-heavy operational view with tabs, dropdown menu affordances, badges, and destructive/empty states.
- Each preview shot must include a renderable `scene` payload with concrete headline, description, actions, and rows/fields/stats for the UI preview.

## Implementation contract

- Start from local `ui/src/components/ui` shadcn-style primitives; do not create a second component system.
- Apply `/katagami/shadcn/katagami-stencil-rail-system/registry-theme.json` variables, then use these recipes for composition and state design.
- Preserve Katagami token names as source metadata; shadcn semantic names are only the export surface.
- Do: Keep accents as 1px strokes, small tabs, outline glyphs, dots, and low-opacity tints.; Use real editorial content with citations, claims, marginalia, and calm decision summaries.; Let negative space and hairlines create hierarchy before adding color or shadow.; Keep long-form text readable with serif typography and generous line-height.
- Do not: Do not use boxed dashboard widgets, thick blue filled selections, or generic sidebar chrome.; Do not turn Japanese motifs into decorative wallpaper, waves, fans, or ornamental backgrounds.; Do not overload the interface with pills, bubbly radii, saturated fills, or heavy drop shadows.; Do not use monospace for body text except citations and structured data.

## Copy-paste component example

This generated starter proves the import shape. Production Katagami agents should replace it with a language-specific product composition.

```tsx
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardFooter,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";

export function KatagamiStencilRailSystemShadcnKit() {
  return (
    <section className="grid gap-4 rounded-[var(--radius)] border bg-background p-4 text-foreground">
      <div className="flex items-start justify-between gap-4">
        <div>
          <Badge variant="outline">shadcn/ui</Badge>
          <h2 className="mt-3 text-2xl font-semibold tracking-tight">Katagami Stencil Rail System</h2>
          <p className="mt-1 max-w-xl text-sm text-muted-foreground">
            Use the Katagami registry theme, then compose these shadcn primitives
            with the language-specific component recipes.
          </p>
        </div>
        <Button>Apply theme</Button>
      </div>

      <Tabs defaultValue="components">
        <TabsList>
          <TabsTrigger value="components">Components</TabsTrigger>
          <TabsTrigger value="states">States</TabsTrigger>
          <TabsTrigger value="export">Export</TabsTrigger>
        </TabsList>
      </Tabs>

      <Card>
        <CardHeader>
          <CardTitle>Component recipe</CardTitle>
          <CardDescription>
            Replace this starter content with the agent-authored product scene
            from components.md and preview-shots.json.
          </CardDescription>
        </CardHeader>
        <CardContent className="grid gap-3 sm:grid-cols-[1fr_auto]">
          <Input defaultValue="Tokenized shadcn surface" aria-label="Recipe name" />
          <Button variant="secondary">Preview state</Button>
        </CardContent>
        <CardFooter className="justify-between">
          <Badge>Ready</Badge>
          <Button variant="outline">Copy recipe</Button>
        </CardFooter>
      </Card>
    </section>
  );
}
```

## Layout notes

{
  "breakpoints": "mobile 375px, tablet 768px, desktop 1200px, wide 1440px",
  "grid": "Desktop uses 12-column reading grid with fixed 56px stencil rail and 320px inspector; tablet stacks inspector below rail; mobile turns rail into top index tabs.",
  "whitespace": "Whitespace is ma-like and rhythmic: 24px between sections, 32px for major shifts, and narrow 8px gutters inside rail modules."
}
preview shotscompatibility fallback
{
  "artifact": "katagami:shadcn-preview-shots",
  "version": "preview-shots-v1",
  "generator": "katagami-ui-compatibility-projection",
  "generatedBy": "katagami-ui-projection",
  "requiresVisualProfile": true,
  "schema": "katagami:shadcn-preview-shots/renderable-v1",
  "renderable": true,
  "language": {
    "id": "en-019ee037-40c7-76f0-8325-d0054fe8dd42",
    "name": "Katagami Stencil Rail System",
    "slug": "katagami-stencil-rail-system"
  },
  "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
  "primitives": [
    "button",
    "card",
    "input",
    "textarea",
    "select",
    "dialog",
    "sheet",
    "tabs",
    "badge",
    "separator",
    "checkbox",
    "switch",
    "slider",
    "tooltip",
    "dropdown-menu",
    "table"
  ],
  "identityNotes": [
    "Three CSS grid columns create a reading plane, 56px stencil rail, and optional 320px inspector sheet with responsive collapse.",
    "One-pixel borders and pseudo-element cut marks form tabs, anchors, separators, and active rail indicators instead of filled controls.",
    "Porcelain and cool-blue surfaces stay nearly flat, with 4 to 8 percent tinted categorical strips rather than saturated background fills.",
    "Long-form serif text receives generous line-height while compact sans labels use uppercase tracking and small numeric rail counters.",
    "Annotation anchors appear as outline glyphs, small tabs, and active dots positioned in the margin rather than pill-heavy badges."
  ],
  "visualProfile": {
    "family": "paper-collage",
    "material": "paper",
    "contour": "pebble",
    "border": "solid",
    "underlay": false,
    "grain": true,
    "stickerBadges": true,
    "motion": "still",
    "density": "dense",
    "accents": [
      "primary",
      "accent",
      "secondary",
      "muted"
    ]
  },
  "shots": [
    {
      "id": "application-shell",
      "title": "Application shell",
      "viewport": "desktop",
      "primitives": [
        "button",
        "card",
        "input",
        "select",
        "tabs",
        "badge",
        "separator",
        "table"
      ],
      "composition": "A real product workspace with navigation, summary cards, filtering controls, and one dense content region.",
      "mustShow": [
        "primary and secondary actions",
        "card hierarchy",
        "filterable state",
        "table or list density"
      ],
      "avoid": [
        "component inventory walls",
        "placeholder-only content",
        "generic rounded SaaS chrome"
      ],
      "scene": {
        "eyebrow": "workspace spread",
        "headline": "Katagami Stencil Rail System launch room",
        "description": "A product team workspace where navigation, filters, metrics, and dense rows carry the language's visible structure.",
        "primaryAction": "Apply theme",
        "secondaryAction": "Review states",
        "stats": [
          {
            "label": "components",
            "value": "16",
            "tone": "accent"
          },
          {
            "label": "states",
            "value": "ready"
          },
          {
            "label": "density",
            "value": "balanced",
            "tone": "warning"
          }
        ],
        "rows": [
          {
            "label": "Primary flow",
            "value": "mapped",
            "status": "active"
          },
          {
            "label": "Token coverage",
            "value": "semantic",
            "status": "synced"
          },
          {
            "label": "Responsive proof",
            "value": "queued",
            "status": "review"
          }
        ],
        "statuses": [
          "Active",
          "Synced",
          "Draft"
        ]
      }
    },
    {
      "id": "detail-editor",
      "title": "Detail editor",
      "viewport": "tablet",
      "primitives": [
        "button",
        "card",
        "input",
        "textarea",
        "select",
        "checkbox",
        "switch",
        "slider",
        "dialog",
        "sheet"
      ],
      "composition": "A focused editing flow with form fields, validation, confirmation, and a contextual side panel.",
      "mustShow": [
        "focus ring",
        "error or destructive state",
        "dialog or sheet treatment",
        "written guidance content"
      ],
      "avoid": [
        "unstyled browser controls",
        "floating cards inside cards",
        "missing labels"
      ],
      "scene": {
        "eyebrow": "editing flow",
        "headline": "Language recipe editor",
        "description": "A focused form proving labels, validation, toggles, panel rhythm, and action hierarchy.",
        "primaryAction": "Save recipe",
        "secondaryAction": "Open sheet",
        "fields": [
          {
            "label": "Component family",
            "value": "Narrative cards"
          },
          {
            "label": "State treatment",
            "value": "Visible focus + validation"
          },
          {
            "label": "Motion",
            "value": "Small lift, no opacity-only fade"
          }
        ],
        "statuses": [
          "Focus",
          "Invalid",
          "Confirmed"
        ]
      }
    },
    {
      "id": "data-operations",
      "title": "Data operations",
      "viewport": "mobile",
      "primitives": [
        "button",
        "tabs",
        "badge",
        "dropdown-menu",
        "table",
        "tooltip",
        "separator"
      ],
      "composition": "A compact operational view proving row rhythm, stacked actions, menu states, badges, and empty/destructive states.",
      "mustShow": [
        "responsive reflow",
        "dense row styling",
        "menu affordance",
        "status badge system"
      ],
      "avoid": [
        "desktop-only tables",
        "text overflow",
        "default shadcn spacing without Katagami character"
      ],
      "scene": {
        "eyebrow": "operations",
        "headline": "Compact review queue",
        "description": "A narrow viewport scene with rows, menus, tooltips, badges, and destructive affordances.",
        "primaryAction": "Resolve",
        "secondaryAction": "Filter",
        "rows": [
          {
            "label": "Button hierarchy",
            "value": "approved",
            "status": "ok"
          },
          {
            "label": "Table rhythm",
            "value": "needs pass",
            "status": "watch"
          },
          {
            "label": "Empty state",
            "value": "designed",
            "status": "done"
          }
        ],
        "statuses": [
          "Queued",
          "Blocked",
          "Done"
        ]
      }
    }
  ],
  "componentRecipes": [
    {
      "primitive": "button",
      "intent": "Prove action hierarchy, focus, disabled, and destructive states."
    },
    {
      "primitive": "card",
      "intent": "Carry the language surface, border, elevation, and density rules."
    },
    {
      "primitive": "input",
      "intent": "Show labels, focus rings, validation, and spacing rhythm."
    },
    {
      "primitive": "textarea",
      "intent": "Show longer guidance, validation copy, and writing density."
    },
    {
      "primitive": "select",
      "intent": "Show filtering, selection contrast, and menu trigger styling."
    },
    {
      "primitive": "dialog",
      "intent": "Show centered decision states and overlay treatment."
    },
    {
      "primitive": "sheet",
      "intent": "Show contextual side panels and responsive editing."
    },
    {
      "primitive": "tabs",
      "intent": "Show navigational structure and active/inactive contrast."
    },
    {
      "primitive": "badge",
      "intent": "Show compact status vocabulary and semantic colors."
    },
    {
      "primitive": "separator",
      "intent": "Show section rhythm without generic gray dividers."
    },
    {
      "primitive": "checkbox",
      "intent": "Show binary selection with visible focus and checked states."
    },
    {
      "primitive": "switch",
      "intent": "Show settings toggles and on/off contrast."
    },
    {
      "primitive": "slider",
      "intent": "Show numeric adjustment with track/thumb styling."
    },
    {
      "primitive": "tooltip",
      "intent": "Show concise explanation styling above compact controls."
    },
    {
      "primitive": "dropdown-menu",
      "intent": "Show action menus, destructive items, and grouped choices."
    },
    {
      "primitive": "table",
      "intent": "Show dense operational data, separators, row states, and responsive behavior."
    }
  ],
  "qualityRules": {
    "do": [
      "Keep accents as 1px strokes, small tabs, outline glyphs, dots, and low-opacity tints.",
      "Use real editorial content with citations, claims, marginalia, and calm decision summaries.",
      "Let negative space and hairlines create hierarchy before adding color or shadow.",
      "Keep long-form text readable with serif typography and generous line-height."
    ],
    "dont": [
      "Do not use boxed dashboard widgets, thick blue filled selections, or generic sidebar chrome.",
      "Do not turn Japanese motifs into decorative wallpaper, waves, fans, or ornamental backgrounds.",
      "Do not overload the interface with pills, bubbly radii, saturated fills, or heavy drop shadows.",
      "Do not use monospace for body text except citations and structured data."
    ]
  }
}
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